[Client:Mobile] Better design

src/web/app/mobile/tags/ui-header.tag

@@ -13,8 +13,7 @@
 			$height = 48px
 
 			display block
-			position -webkit-sticky
-			position sticky
+			position fixed
 			top 0
 			z-index 1024
 			width 100%

src/web/app/mobile/tags/ui.tag

@@ -8,6 +8,7 @@
 	<style>
 		:scope
 			display block
+			padding-top 48px
 	</style>
 	<script>
 		this.mixin('stream');